[GadgetKen]

An interesting idea for people who make a high volume of international phone calls and travel to many countries...but don't think anything like this currently exists (if someone knows differently please chime in).

Problem is to have unlimited international calls in multiple countries a provider would have to charge a very high base fee per month.

A VOIP device (e.g. Skype) would come close for computer to computer phone calls, or very low rate calls to many countries from a VOIP device to a landline, but this scheme would be dependent on free or low cost high speed internet being widely available...unfortunately it is not like that everywhere.

A more realistic way to accomplish this would be to have a dual, triple or quad sim phone with unlimited usage sim chips dedicated to commonly visited countries. For instance the US has several resellers that have "unlimited" (but not unreasonable) service that includes international long distance to certain countries. The AT&T MVNO I use called Jolt, has a US$50/month plan that includes unlimited calls and international long distance: JoltMobile.com But I just use their $.15/minute flat rate plan that includes international long distance because my calling needs are not that great. Of course, the sim chip would be useless outside the USA for roaming (other than emergency calls) so this is not a one sim chip solution.